Actual tire size BFG's All Terrain 37x12.50x17

[chsapeak]

Manufacturer says they're 36.5" diameter, but when I use a level and measure to the ground I get just about 35". What should I set my tire size to with my taser? 35 or 36.5?

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[yoda13]

That’s a good question. I would say 35.”
Do you have photos? Are you running stock wheels? I am getting ready to buy tires and I am wondering if I should go with the the 37s if they really only measure 35...those are the tires I’m going with...

 

[JTpoor]

I did actual height of the tire using a level and then compared my speedometer on the highway to a speedometer app I have on my phone. It was more accurate than using the manufacturer height.
I have 37x12.50’s shown here

 

[yoda13]

I did actual height of the tire using a level and then compared my speedometer on the highway to a speedometer app I have on my phone. It was more accurate than using the manufacturer height.
I have 37x12.50’s shown here

what is their real world height?

 

[JTpoor]

I can’t remember exactly. I want to say they were only about 35.75”. I love these tires but to call them 37’s is pretty misleading. I think they only crest the 36” mark if you have them pretty highly inflated.

 

[foxman350]

I have mine set close to 36 have had it from 35 to 36 and my Speedo app does not change much if at all

 

[Renegade]

Make sure you app isn’t drawing the speed from your Jeep if you’re connected via a USB. This happens with many phone apps. I’ve tested this myself, and the phone app speed changes when connected to the Jeep.

 

[danielspivey]

I think it’s interesting why people run large tires in the 30-32 range and expect them to be a perfect circle and not oval.

The diameter top to bottom is always less than left to right because it’s under load. If you decrease tire pressure the height diameter will decrease, and air up it’ll increase.

Circumference shouldn’t change.... remember C = πd?

Inflate the tires to 65 they will likely be closer to 37” tall

 

[Reasons]

Manufacturer says they're 36.5" diameter, but when I use a level and measure to the ground I get just about 35". What should I set my tire size to with my taser? 35 or 36.5?

Setting your tire size is trial and error using the Tazer. I have 37 Pats and they measured 35.5" with the full weight of my Gladiator. However, I had to set my tire size to 36.6 in the Tazer to match the speed of my GPS' (phone and dash cam).

As noted above, if using your phone as a source to test your speed, ensure NOT to connect it to UConnect. Get on the freeway and set cruise control to 65/70 and see how far off your speedo is to your GPS speed. Adjust from there.

 

[chsapeak]

Here's my rig with the new 37's in the first picture... The 2nd photo IS WITH the 35"s

 

[Jeeperjamie]

I think it’s interesting why people run large tires in the 30-32 range and expect them to be a perfect circle and not oval.

The diameter top to bottom is always less than left to right because it’s under load. If you decrease tire pressure the height diameter will decrease, and air up it’ll increase.

Circumference shouldn’t change.... remember C = πd?

Inflate the tires to 65 they will likely be closer to 37” tall

This totally!! I find it interesting as well. The manufacturer estimates height based on a none mounted tire. They have no idea what kind of weight you have on your rig or how heavy the rig is your putting the tires on. With that said BFGs are one of the smaller ones but anything that measures over 36 not mounted is going to be considered a 37 by any manufacturer.

 

[Benbean66]

Here's my rig with the new 37's in the first picture... The 2nd photo IS WITH the 35"s

Badass looking JT. Making me think I need 37's rather than 35's when these Nitto's wear out.

 

[yoda13]

Here's my rig with the new 37's in the first picture... The 2nd photo IS WITH the 35"s

What lift, any?

 

[danielspivey]

What lift, any?

37s=need a lift

 

[yoda13]

37s=need a lift

Not necessarily, several guys are running 37s on their Mojaves on the factory suspension with no rub

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